This time, I read all of the above instructions from the beginning. Then followed them step by step, AND IT WORKED! I now have a clean re-install of Win7 Professional on my third pc.
Two things:
1) After the files installed, and my pc automatically re-started, instead of completing the installation, it auto-installed again from scratch. I didn't touch it, and just let it go through the re-install again.
The second time my pc-restarted, I gently removed the bootable USB drive, and then, my pc completed the installation. All I needed to do was enter my product key to activate it, and that pc is now up and running.
2) There was no need to run the dism++ activation as you listed above. At least, there was no specific request to activate other than entering my product key.
Once the updates have downloaded and installed, I will run Bitdefender and Malware bytes.
Thank you so very much for all of your help which I greatly appreciate.
Jane